[R] Drought Severity Index (DSI)

[Muhammad Rahiz]

Thanks Steve!

Muhammad Rahiz  |  Doctoral Student in Regional Climate Modeling					
Climate Research Laboratory, School of Geography & the Environment	
Oxford University Centre for the Environment
South Parks Road, Oxford, OX1 3QY, United Kingdom 
Tel: +44 (0)1865-285194	 Mobile: +44 (0)7854-625974
Email: muhammad.rahiz at ouce.ox.ac.uk






Steve_Friedman at nps.gov wrote:
> A few years ago, I work with Stuart Gage who had developed a Heat /
> Precipitation Index as a measure of drought severity.  It works just as
> well if not better than the Palmer Drought Index.
>
> You can find the formula in this only pdf report:  Climate Variability in
> the North Central Region:
>   http://goes.msu.edu/publications/pdfs_ps/CGCEO%2085.pdf
>
> Google search:  Stuart Gage Heat Precipitation Index
>
> If you can not download the file.  Write to me individually and I'll send
> it directly.
>
> Steve
>
> Steve Friedman Ph. D.
> Spatial Statistical Analyst
> Everglades and Dry Tortugas National Park
> 950 N Krome Ave (3rd Floor)
> Homestead, Florida 33034
>
> Steve_Friedman at nps.gov
> Office (305) 224 - 4282
> Fax     (305) 224 - 4147
>
>
>                                                                            
>              Muhammad Rahiz                                                
>              <muhammad.rahiz at o                                             
>              uce.ox.ac.uk>                                              To 
>              Sent by:                  Jim Lemon <jim at bitwrit.com.au>      
>              r-help-bounces at r-                                          cc 
>              project.org               "r-help at r-project.org"              
>                                        <r-help at r-project.org>              
>                                                                    Subject 
>              01/12/2010 06:21          Re: [R] Drought Severity Index      
>              AM                        (DSI)                               
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>
>
> Hello Jim,
>
> Thanks for the response. I have the algorithm based on the original
> paper (Bryant et al. 1994) and subsequent modification by Philips and
> McGregor(1994). The latter gives the formula for calculating the index
> in MS Excel. I'm trying to translate it to R.
>
>
>
>
>
> Muhammad
>
> Muhammad Rahiz  |  Doctoral Student in Regional Climate Modeling
>
> Climate Research Laboratory, School of Geography & the Environment
>
> Oxford University Centre for the Environment
> South Parks Road, Oxford, OX1 3QY, United Kingdom
> Tel: +44 (0)1865-285194         Mobile: +44 (0)7854-625974
> Email: muhammad.rahiz at ouce.ox.ac.uk
>
>
>
>
>
>
> Jim Lemon wrote:
>   
>> On 01/12/2010 07:21 PM, Muhammad Rahiz wrote:
>>
>>     
>>> Does anyone have the code to calculate the drought severity index?
>>>
>>>
>>>
>>>       
>> Hi Muhammad,
>> If you mean "does anyone have the algorithm?" it seems pretty hard to
>> find. Even that old standby Wikipedia didn't have a description of
>> Palmer's algorithm. If you happen to have the algorithm but not the R
>> code, perhaps mentioning that might get some responses.
>>
>> Jim
>>
>>
>>     
>
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